// ====================变量定义======================
// ================Start================
/**@type {HTMLCanvasElement} */
const $video_canvas = document.getElementById("video_canvas");
const $video_canvas_ctx = $video_canvas.getContext('2d');
/**@type {HTMLVideoElement} */
const $video = document.getElementById("video");
// $video.style.visibility = "hidden";
const $div_video = document.querySelector(".video");
$div_video.style.visibility = "hidden";
$video.pause();

// ================End==================
// ------------函数定义---------



// ------------响应函数----------

$playVideoPage_button.onclick = function() {
    $app.style.visibility = "hidden";
    $div_video.style.visibility = "visible";
    // $video.play();
    message.style.visibility = "hidden";
    messageTxt.style.visibility = "hidden";
    btn.style.visibility = "hidden";
    // $start_button.style.visibility = "visible";
}